CVE-2023-33962 JStachio XSS vulnerability: Unescaped single quotes

2023-05-3021:42:45

CWE-79

GitHub_M

www.cve.org

jstachio

xss

vulnerability

html

escape

javascript

5.4 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

0.001 Low

EPSS

Percentile

38.7%

JSON

JStachio is a type-safe Java Mustache templating engine. Prior to version 1.0.1, JStachio fails to escape single quotes ' in HTML, allowing an attacker to inject malicious code. This vulnerability can be exploited by an attacker to execute arbitrary JavaScript code in the context of other users visiting pages that use this template engine. This can lead to various consequences, including session hijacking, defacement of web pages, theft of sensitive information, or even the propagation of malware.

Version 1.0.1 contains a patch for this issue. To mitigate this vulnerability, the template engine should properly escape special characters, including single quotes. Common practice is to escape ' as &#39. As a workaround, users can avoid this issue by using only double quotes " for HTML attributes.

CNA Affected

[
  {
    "vendor": "jstachio",
    "product": "jstachio",
    "versions": [
      {
        "version": "< 1.0.1",
        "status": "affected"
      }
    ]
  }
]